I may have a problem with mine , but till I've tried the same sort of shots again I won't know for sure.

I certainly composed my pics carefully , I felt that the centre was in the centre of the viewfinder but when I saw it afterwards I can best describe it as thrown left , the left hand side having been cropped and the right hand side having far more included in the picture than it should have .

Any help from anyone would be greatly appreciated . let the education continue

I know what you are all saying . I know that what I see in the viewfinder is not 100% what I'll get in the actual picture . I also expected to get some distortion vertically as my camera was very slightly tilted . If anything I had clipped the top and bottom slightly , expecting to get them in the finished picture .

BUT I'm convinced that the centre of the window was in the centre of the viewfinder . let the education continue

OK I'm thinking aloud here. If you are convinced the image was in the center of the view finder. What you saw was seen through the lens, so the lens could not misalign the image. I think the same applied to the mirror and the focus screen. Unless something is covering part of one of them and giving a false edge in the viewfinder. Barrie
Too Old To Die Young.Pentax K3 K5-IIS K-01 K20D A50/2 A50/1.7 DA10-17 DA18-250 DA18-135 DA18-55 DA300 DA40 DA50-135 DA50-200 DA55-300 DA70 F35-70 FA100 FA135 FA35 FA50 K55/1.8 M135/3.5 M200/4 M28/3.5 M28/2.8 M40/2.8 Q 01 02 MX-1 I-10 Sigma 24 105 180 8-16 10-20 17-50/2.8 24-70 150-500 400/5.6MF Tamron 70-200/2.8 17/3.5MF 24/2.5MF 28/2.5MF 90/2.5MF

Can you try taking some with another lens to see if you get the same effect. Anything will do that has something thats supposed to be in the center. If the problem is with the camera it should still show up. Barrie
Too Old To Die Young.Pentax K3 K5-IIS K-01 K20D A50/2 A50/1.7 DA10-17 DA18-250 DA18-135 DA18-55 DA300 DA40 DA50-135 DA50-200 DA55-300 DA70 F35-70 FA100 FA135 FA35 FA50 K55/1.8 M135/3.5 M200/4 M28/3.5 M28/2.8 M40/2.8 Q 01 02 MX-1 I-10 Sigma 24 105 180 8-16 10-20 17-50/2.8 24-70 150-500 400/5.6MF Tamron 70-200/2.8 17/3.5MF 24/2.5MF 28/2.5MF 90/2.5MF